Treadmill and testing device thereof

Abstract

The invention discloses a treadmill and a testing device thereof. The treadmill comprises a running frame, an adjustable driven roller arranged at the rear end of the running frame, a running plate and a running belt. Adjusting assemblies used for adjusting the driven roller are symmetrically arranged on the two sides of the running frame. The adjusting assembly comprises an adjusting rod connected with the driven roller, and an adjusting frame matched with the adjusting rod is arranged on the running frame. A first screw in threaded connection with the adjusting frame is arranged at one end of the adjusting rod, and a second screw in sliding connection with the adjusting frame is arranged at the other end of the adjusting rod; the first screw rod and the second screw rod are opposite in thread turning direction; the adjusting frame is provided with a thread locking block with the same thread screwing direction as the second screw. According to the driven roller adjusting assembly of the running machine, after the driven roller is adjusted, the driven roller is locked at the adjusted position through the reverse threads and the threaded locking blocks, so that the driven roller cannot generate displacement due to thread loosening after being used for a long time, and the use stability of the running machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of treadmills and their testing equipment, and in particular to a treadmill and its testing device. Background Art

[0002] In a flat treadmill, the tightness of the running belt directly affects the transmission efficiency, user experience, and equipment life. The traditional adjustment method realizes tension control by moving the position of the driven roller back and forth, and its typical structure relies on a bolt-nut locking mechanism. However, this technology has the following key problems: 1. Strong dependence on manual labor and insufficient precision: The adjustment process completely depends on the operator's experience, and the tightness cannot be quantified. When it is too loose, the friction between the running belt and the driving roller is insufficient, resulting in slipping, power interruption, or running belt deviation; when it is too tight, it accelerates the wear of the running belt and the running roller surface, significantly shortening the life of the running belt; 2. Locking failure under dynamic conditions: The traditional bolt-nut mechanism is prone to self-relaxation under the high-frequency vibration and periodic load of the treadmill, resulting in a gradual attenuation of the running belt tension, and frequent repeated adjustments are required, increasing the maintenance cost.

[0003] 3. The existing technology lacks an objective measurement method for the running belt tension, and only judges the tightness by hand feeling or visual inspection, resulting in poor consistency between different devices, especially difficult to achieve standardized management in large-scale production or after-sales maintenance. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a treadmill and its testing device, which solves the defect that the traditional bolt adjustment is easy to loosen through an anti-thread self-locking structure, and realizes the standardized calibration of the running belt tightness by using a quantitative testing system.

[0005] To solve the above technical problems, the present invention is solved by the following technical solutions: A treadmill, comprising a running frame, an adjustable driven roller arranged at the rear end of the running frame, a running board, and a running belt; Adjusting components for adjusting the driven roller are symmetrically arranged on both sides of the running frame; The adjusting component includes an adjusting rod connected to the driven roller, and an adjusting frame matched with the adjusting rod is arranged on the running frame; One end of the adjusting rod is provided with a first screw rod threadedly connected to the adjusting frame, and the other end is provided with a second screw rod slidably connected to the adjusting frame; The first screw rod and the second screw rod have opposite thread directions; A thread locking block with the same thread direction as the second screw rod is arranged on the adjusting frame.

[0006] In the above solution, preferably, a locking spring is arranged between the thread locking block and the adjusting frame.

[0007] In the above solution, preferably, a guide rod slidably connected to the adjustment frame is provided on the threaded lock block.

[0008] In the above solution, preferably, the driven roller includes a rotating shaft, a sliding hole is provided on the rotating shaft, the adjusting rod is arranged through the sliding hole, and limiting plates cooperating with the rotating shaft are symmetrically provided on the adjusting rod.

[0009] In the above solution, preferably, a testing device for a treadmill includes a testing platform for placing the treadmill, and a damping unit for simulating human stepping is provided on the testing platform; The damping unit includes a sliding frame and a plurality of damping blocks arranged vertically on the sliding frame. A driving push rod connected to the damping block is provided on the sliding frame, and the driving push rod is connected to a controller; A stepping motor for driving the adjusting rod to rotate so as to displace the driven roller is provided on the testing platform, and the driving push rod is electrically connected to the stepping motor through the controller; A damping spring connected to the sliding frame is provided on one side of the testing platform, and a button for detecting the sliding distance of the sliding frame is provided on the other side; The button is connected to the controller.

[0010] In the above solution, preferably, a cross beam is provided on the testing platform, a plurality of rollers cooperating with the cross beam are provided on the sliding frame, and the sliding frame is slidably arranged on the cross beam through the rollers.

[0011] In the above solution, preferably, a first gear disk cooperating with the stepping motor is provided on the adjusting rod. The stepping motor includes an output shaft, a second gear disk cooperating with the first gear disk is slidably arranged on the output shaft, and a clutch spring is provided between the second gear disk and the stepping motor.

[0012] In the above solution, preferably, the output shaft includes a guide shaft, and the second gear disk includes a guide sleeve slidably connected to the guide shaft.

[0013] In the above solution, preferably, a limiting block is connected to the threaded lock block through the guide rod. A locking plate cooperating with the limiting block is provided on the testing platform. The locking plate is connected to the testing platform through a locking push rod, and the locking push rod is connected to the controller.

[0014] In the above solution, preferably, a first positioning block cooperating with the front end of the running frame and a second positioning block cooperating with the rear end of the running frame are symmetrically provided on the testing platform. A cross bar is provided at the bottom of the running frame, and a groove cooperating with the cross bar is provided on the second positioning block.

[0015] The beneficial effects of the present invention are as follows: The present invention provides a driven roller adjustment assembly for a treadmill. After the driven roller is adjusted, it is locked at the adjusted position through reverse threads and a threaded lock block, so that the driven roller will not be displaced due to thread loosening after long-term use, improving the use stability of the treadmill. At the same time, a test device for testing and adjusting the positioning of the adjustment assembly is also provided, realizing the automatic calibration and adjustment of the driven roller during factory production, greatly improving the standardization of the treadmill during factory production, and also improving the installation efficiency of the treadmill. In addition, parameterization during treadmill factory production is achieved through mechanical adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a combined three-dimensional structural schematic diagram of the treadmill and the test device of the present invention.

[0017] Figure 2 It is a sectional structural schematic diagram of the present invention.

[0018] Figure 3 It is a three-dimensional structural schematic diagram at the adjustment assembly of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the adjustment screw of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the test device of the present invention.

[0021] Figure 6 For the present invention Figure 2 The partial enlarged structural schematic diagram at position A in it. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below in conjunction with the drawings and the specific embodiments: Refer to Figures 1-6 .

[0023] A treadmill includes a running frame 1, an adjustable driven roller 2 provided at the rear end of the running frame 1, a running board 4 and a running belt 5. The running board 4 is provided below the running belt 5, and a driving roller is provided at the front end of the running frame 1. The driving roller is connected to a driving motor. The running belt 5 is wound around the driving roller and the driven roller 2, and the tension of the running belt 5 is adjusted by adjusting the center distance between the driven roller 2 and the driving roller.

[0024] The running board 4 is provided between the driving roller and the driven roller 2, and it is horizontally placed between the driving roller and the driven roller 2. The running belt 5 is also wound around the running board 4. During use, walking or running is realized by stepping on the upper surface of the running belt 5 on the running board 4. This is the existing mechanism of the treadmill and will not be elaborated here too much.

[0025] On both sides of the running frame 1, there are symmetrically arranged adjusting components for adjusting the driven roller 2. Specifically, the adjusting component includes an adjusting rod 3 connected to the driven roller 2, and an adjusting frame 101 is provided on the running frame 1 and is matched with the adjusting rod 3. The adjusting frame 101 is in a U-shaped state as shown in Figure 2 and Figure 3 shown. The adjusting rod 3 passes through the side plates of the adjusting frame 101. On the side of the adjusting rod 3 close to the driving roller, it is connected to the adjusting frame 101 by a thread, that is, the position of the adjusting rod 3 relative to the adjusting frame 101 is adjusted through the thread.

[0026] On the middle of the adjusting rod 3, there are symmetrically arranged limiting plates 305. The driven roller 2 includes a rotating shaft 201 and sliding holes 202 provided at both ends of the rotating shaft 201. The adjusting rod 3 passes through the sliding holes 202. After the adjusting rod 3 is installed and matched with the rotating shaft 201, the limiting plates 305 on both sides are fixedly arranged on both sides of the rotating shaft 201. When the adjusting rod 3 adjusts its position relative to the adjusting frame 101 through the thread, it drives the driven roller 2 to synchronously adjust its position relative to the adjusting frame 101, that is, to adjust the center distance between the driven roller 2 and the driving roller, and further to adjust the tightness of the running belt 5.

[0027] The central axis of the sliding hole 202 is perpendicular to the central axis of the rotating shaft 201, that is, the central axis of the adjusting rod 3 is perpendicular to the central axis of the rotating shaft 201. The end of the adjusting rod 3 close to the driving roller is threadedly connected to the adjusting frame 101, and the end far from the driving roller is slidably arranged on the adjusting frame 101. Specifically, as shown in Figure 2 and Figure 6 shown, the left end of the adjusting rod 3 is provided with a first screw rod 301 threadedly connected to the adjusting frame 101, and the right end is provided with a second screw rod 302 slidably connected to the adjusting frame 101. The first screw rod 301 and the second screw rod 302 are arranged on both sides of the symmetrically arranged limiting plates 305.

[0028] The thread rotation directions of the first screw rod 301 and the second screw rod 302 are opposite, that is, the first screw rod 301 and the second screw rod 302 are provided with reverse threads. On the right side of the adjusting frame 101, there is a thread locking block 303 with the same thread rotation direction as the second screw rod 302. Specifically, the thread locking block 303 is a semi-circular block, and its semi-circular hole is provided with a thread threadedly matched with the second screw rod 302. The thread locking block 303 is vertically slidably arranged on the right side wall of the adjusting frame 101.

[0029] The lower end wall of the threaded locking block 303 is provided with a guide rod 304 extending vertically downward, and the adjusting frame 101 is provided with a guide hole, that is, the threaded locking block 303 is vertically guided and slidably arranged on the adjusting frame 101, and the guide rod 304 is preferably a hexagonal rod, and a locking spring 102 is arranged between the threaded locking block 303 and the adjusting frame 101, and the locking spring 102 is sleeved on the guide rod 304 and the upper end of the locking spring 102 is against the threaded locking block 303, and the lower end is against the horizontal plate on the adjusting frame 101, and the lower end of the guide rod 304 is guided and slidably arranged on the horizontal plate When the threaded locking block 303 is pushed upward by the locking spring 102 and then engages with the thread of the second screw rod 302, at this time, because the threads of the first screw rod 301 and the second screw rod 302 rotate in opposite directions, the adjusting rod 3 cannot rotate, thereby realizing self-locking of the driven roller 2; when the adjusting rod 3 needs to adjust the driven roller 2, the threaded locking hole 303 is slid downward to compress the locking spring 102 so that it is disengaged from the thread of the second screw rod 302. At this time, the first screw 301 can be rotated to make the adjusting rod 3 slide horizontally, thereby realizing the adjustment of the center distance between the driven roller 2 and the active roller.

[0030] This embodiment also provides a treadmill testing device, so as to gradually adjust and test the tightness of the treadmill belt during installation, so that the tightness of the treadmill belt set at the factory can be unified. Specifically, the testing device includes a test table 6 for placing the treadmill, and the test table 6 is provided with a damping unit that simulates human stepping.

[0031] Specifically, the front end of the test bench 6 is symmetrically provided with a first positioning block 10, and the rear end is symmetrically provided with a second positioning block 11. Figure 5 As shown, the first positioning block 10 is provided with a right-angle groove, and the second positioning block 11 is provided with a groove 13. When the treadmill is placed, the right angles on both sides of the front end of the running frame 1 are matched and clamped with the right-angle grooves on the first positioning block 10, and the lower end surface is placed on the plane of the right-angle groove, and a cross bar 12 is provided on the bottom surface of the middle part of the rear end of the running frame 1, and the cross bar 12 is clamped in the groove 13, and the lower end surface of the running frame 1 is in contact with the plane of the second positioning block 11, thereby realizing the front and back and left and right positioning of the running frame 1 on the test bench 6.

[0032] The damping unit includes a sliding frame 601 and a plurality of damping blocks 602 which are lifted and lowered on the sliding frame 601. Figure 1 and Figure 5 As shown, the damping blocks 602 are provided in two groups and are symmetrically arranged above both sides of the treadmill 1, that is, arranged above the running belt 5. The sliding frame 601 is provided with a driving push rod 603 connected to the damping blocks 602. The driving push rod 603 can be a cylinder. When the damping blocks 602 slide downward under the drive of the cylinder, contact the running belt 5 and press down onto the running board 4, the running belt 5 can be subjected to corresponding resistance during transmission.

[0033] A cross beam 606 is provided on the test bench 6. A number of rollers 607 cooperating with the cross beam 606 are provided on the sliding frame 601. The sliding frame 601 is horizontally slidably arranged on the cross beam 606 through the rollers 607, and the sliding direction is the same as the driving direction of the running belt 5. A damping spring 604 is arranged between the front end of the sliding frame 601 (the end far from the driving direction of the running belt 5) and the cross beam 606. When the damping block 602 is pressed down to contact the running belt 5, the damping block 602 slides in the driving direction of the running belt 5 under the drive of the running belt 5, so that the sliding frame 601 pulls the damping spring 604.

[0034] A button 605 is provided on one side of the cross beam 606 in the sliding direction of the sliding frame 601. When the tension of the running belt 5 meets the factory requirements, it can drive the damping block 602 to slide. After sliding a certain distance, it contacts the button 605 and triggers the button, thus realizing automatic detection.

[0035] Both the driving push rod 603 and the button 605 are connected to the controller. The controller can adopt a host computer with a PLC controller to realize the adjustment and control of parameters. A stepping motor 7 for driving the adjusting rod 3 to rotate and thus displace the driven roller 2 is provided on the test bench 6. A first tooth disc 701 cooperating with the stepping motor 7 is provided at one end of the adjusting rod 3 away from the driving roller. A number of convex teeth are provided on the end face of the first tooth disc 701. The stepping motor 7 includes an output shaft 702. A second tooth disc 703 meshing with the first tooth disc 701 is slidably arranged on the output shaft 702. The second tooth disc 703 is provided with convex teeth having the same tooth shape as those of the first tooth disc 701. The convex teeth of the first tooth disc 701 and the second tooth disc 703 are meshed in an alternating manner, so that when the second tooth disc 703 rotates, it drives the first tooth disc 701 to rotate.

[0036] A clutch spring 704 is arranged between the second tooth disc 703 and the stepping motor 7. The output shaft 702 includes a guide shaft 705. The second tooth disc 703 includes a guide sleeve 706 slidably connected to the guide shaft 705. The clutch spring 704 is sleeved on the guide sleeve 706 and abuts against the second tooth disc 703 and the output shaft 702 at both ends respectively. The displacement of the second tooth disc 703 facilitates its meshing installation with the first tooth disc 701 and realizes transmission after installation.

[0037] The driving push rod 603 is electrically connected to the stepping motor 7 through the controller. When the driving push rod 603 is driven once, the controller records the time. If the button 605 is not triggered within the time interval of N seconds, it means that currently the driven roller 2 is in a slipping state under the action of the damping block 602. At this time, the controller controls the stepping motor 7 to rotate an angle, so that the adjusting rod 3 rotates a certain pitch, thereby increasing the center distance between the driven roller 2 and the driving roller and improving the tension of the running belt 5.

[0038] As shown Figure 6 As shown, the threaded lock block 303 is connected with a limit block 306 through a guide rod 304. A locking plate 8 matched with the limit block 306 is arranged on the test bench 6. The locking plate 8 is connected with the test bench 6 through a locking push rod 9. After the treadmill is placed on the test bench 6, the locking push rod 9 pushes out the locking plate 8 and clamps it above the limit block 306. At this time, the threaded lock block 303 is disengaged from the second screw rod 302, that is, the adjusting rod 3 is in an adjustable state. After the locking push rod 9 is triggered and the locking plate 8 is displaced to the right and disengaged from the limit block 306, the threaded lock block 303 meshes and locks with the second screw rod 302 under the elastic force of the locking spring 102, so that the adjusting rod 3 is in a locked state; the locking push rod 9 is connected with the controller.

[0039] Method of using the treadmill testing device as described above: When the treadmill needs to be debugged after preliminary assembly, the treadmill is placed on the test bench 6 through the running frame 1. At this time, the driven roller 2 is first pre-adjusted to the state of the shortest center distance from the driving roller, that is, the limit plate 305 on the left side of the adjusting rod 3 abuts against the frame body on the left side of the adjusting frame 101. Subsequently, the locking plate 8 on the locking push rod 9 clamps the limit block 306, the threaded lock block 303 is disengaged from the second screw rod 302, and the first tooth disc 701 is engaged with the second tooth disc 703; Subsequently, start the treadmill to drive the running belt 5. The damping block 602 on the test bench 6 descends to contact the running belt 5 and then is pressed onto the running board 4. After pressing for a period of time, if the tension of the running belt 5 is insufficient, it is difficult for the running belt 5 to drive the damping block 602 to slide and further drive the sliding frame 601 to slide. At this time, the controller will lift the damping block 602 after a period of time. At the same time, control the stepping motor 7 to rotate, and rotate the adjusting rod 3, so as to increase the center distance between the driven roller 2 and the driving roller (increase the tension of the running belt 5); After the stepping motor 7 rotates a certain angle, repeat the step of pressing down the damping block 602 until the running belt 5 drives the damping block 602 to slide after a period of time and synchronously drives the sliding frame 601 to slide and trigger the button 605. At this time, the controller receives the feedback of the button 605, indicating that the running belt 5 already meets the tension requirement at this time. At this time, trigger the locking push rod 9 to drive the locking plate 8 to slide to the right and disengage from the limit block 306. The threaded lock block 303 meshes with the second screw rod 302 under the action of the locking spring 102, realizing the locking of the adjusting rod 3, completing the test of the tension of the treadmill, that is, completing the factory debugging.

[0040] When the treadmill is testing the durability of the running belt, this test device can also be used for the test. After the running belt 5 of the treadmill undergoes the factory tension test, the durability test of the running belt 5 is carried out. At this time, the running belt 5 is driven, and the damping blocks 602 on both sides of the test bench 6 can be pressed down through the controller to apply resistance to the running belt 5. Initially, the button 605 can be triggered each time, that is, the running belt has not been worn. After driving for a period of time, the button 605 is not triggered. At this time, the driving time or the number of driving circles of the running belt 5 is recorded to realize the initial durability test of the running belt 5; then the test continues, that is, the tightness of the running belt 5 is adjusted by the stepping motor 7. At this time, the distance adjusted by the stepping motor 7 can be recorded and converted into the value of the elongation of the running belt 5 through the controller. When the elongation value reaches a certain distance, it is the scrapping or replacement distance of the running belt 5. At this time, the controller records the total number of running circles or mileage of the running belt 5 from the initial tension to the last tension, so as to realize the durability test of the running belt 5.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A treadmill, characterized in that: It includes a running frame (1), an adjustable driven roller (2) provided at the rear end of the running frame (1), a running board (4) and a running belt (5); Adjusting components for adjusting the driven roller (2) are symmetrically provided on both sides of the running frame (1); The adjusting component includes an adjusting rod (3) connected to the driven roller (2), and an adjusting frame (101) cooperating with the adjusting rod (3) is provided on the running frame (1); One end of the adjusting rod (3) is provided with a first screw rod (301) threadedly connected to the adjusting frame (101), and the other end is provided with a second screw rod (302) slidably connected to the adjusting frame (101); The first screw rod (301) and the second screw rod (302) have opposite thread rotation directions; A thread locking block (303) with the same thread rotation direction as the second screw rod (302) is provided on the adjusting frame (101).

2. A treadmill according to claim 1, wherein: A locking spring (102) is provided between the thread locking block (303) and the adjusting frame (101).

3. A treadmill according to claim 1, wherein: A guide rod (304) slidably connected to the adjusting frame (101) is provided on the thread locking block (303).

4. A treadmill according to claim 1, characterized in that: The driven roller (2) includes a rotating shaft (201), a sliding hole (202) is provided on the rotating shaft (201), the adjusting rod (3) is arranged through the sliding hole (202), and limiting plates (305) cooperating with the rotating shaft (201) are symmetrically provided on the adjusting rod (3).

5. A test device for testing a treadmill according to claim 1, characterized in that: It includes a test bench (6) for placing a treadmill, and a damping unit for simulating human stepping is provided on the test bench (6); The damping unit includes a sliding frame (601) and a number of damping blocks (602) arranged vertically on the sliding frame (601), a driving push rod (603) connected to the damping block (602) is provided on the sliding frame (601), and the driving push rod (603) is connected to a controller; A stepping motor (7) for driving the adjusting rod (3) to rotate so as to displace the driven roller (2) is provided on the test bench (6), and the driving push rod (603) is electrically connected to the stepping motor (7) through the controller; A damping spring (604) connected to the sliding frame (601) is provided on one side of the test bench (6), and a button (605) for detecting the sliding distance of the sliding frame (601) is provided on the other side; The button (605) is connected to the controller.

6. The treadmill testing device according to claim 5, wherein: A cross beam (606) is provided on the test bench (6), a number of rollers (607) cooperating with the cross beam (606) are provided on the sliding frame (601), and the sliding frame (601) is slidably arranged on the cross beam (606) through the rollers (607).

7. The treadmill testing device according to claim 5, wherein: A first tooth disc (701) cooperating with the stepping motor (7) is provided on the adjusting rod (3), the stepping motor (7) includes an output shaft (702), a second tooth disc (703) slidably arranged on the output shaft (702) and cooperating with the first tooth disc (701) is provided, and a clutch spring (704) is provided between the second tooth disc (703) and the stepping motor (7).

8. A treadmill testing device according to claim 7, wherein: The output shaft (702) includes a guide shaft (705), and the second tooth disc (703) includes a guide sleeve (706) slidably connected to the guide shaft (705).

9. The treadmill testing device according to claim 5, characterized in that: The threaded locking block (303) is connected to a limit block (306) through a guide rod (304). A locking plate (8) that cooperates with the limit block (306) is provided on the test bench (6). The locking plate (8) is connected to the test bench (6) through a locking push rod (9), and the locking push rod (9) is connected to a controller.

10. A treadmill testing device according to claim 5, characterized in that: First positioning blocks (10) that cooperate with the front end of the running frame (1) and second positioning blocks (11) that cooperate with the rear end of the running frame (1) are symmetrically provided on the test bench (6). A cross bar (12) is provided at the bottom of the running frame (1), and a groove (13) that cooperates with the cross bar (12) is provided on the second positioning block (11).

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