Adjustable base for fatigue performance test of swivel chair

Abstract

The utility model discloses an adjustable base for a fatigue performance test of a swivel chair, which comprises a base, a bearing surface formed on the base, an annular sliding chute formed on the bearing surface along the axis, an opening formed on the sliding chute corresponding to the side surface of the base, and a plurality of traction units, each traction unit comprises a sliding block and a traction rod, and the sliding block is located in the sliding chute and is in sliding connection with the sliding chute. A connecting hole is formed in the upper end of the sliding block, one end of the traction rod is fixed to the connecting hole, the other end of the traction rod forms a connecting end, the connecting end is used for being connected with the swivel chair, the traction rod is used for applying traction force in the axis direction of the traction rod to the swivel chair, and continuous and stable traction force can be provided for the swivel chair through the traction unit, so that accuracy of test data is guaranteed. Through the arrangement of the opening, the appropriate number of traction units can be selected as required to realize different simulation environments, so that the adaptability is improved, and meanwhile, the number of the traction units can be conveniently changed.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, and more specifically, to an adjustable base for a swivel chair fatigue performance test. Background Art

[0002] For the fatigue test of a swivel chair, the swivel chair needs to be installed on a base, and the swivel chair is rotated for a long time to detect its fatigue limit.

[0003] During the fatigue detection test process, a load needs to be set on the swivel chair to simulate the real scenario when a human body uses the swivel chair. For this type of simulation method, currently, it is mostly completed by directly placing sandbags on the swivel chair. As a result, during the detection process, the instability of the sandbag itself is likely to cause displacement or even be thrown out of the swivel chair during the long-term rotation process, leading to inaccurate or even failed tests. At the same time, there are problems of difficult fixation and inconvenient operation when setting loads for the fatigue strength test of a single local position. Therefore, it needs to be improved. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an adjustable base for a swivel chair fatigue performance test, which can provide a continuous and stable load for the swivel chair to ensure meeting different fatigue test requirements.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An adjustable base for a swivel chair fatigue performance test, including a base, a receiving surface is formed on the base, a circular chute is provided along the axis of the receiving surface, and the chute forms an opening corresponding to the side surface of the base;

[0007] A number of traction units, each traction unit includes a slider and a traction rod, the slider is located in the chute and is slidably connected to the chute, a connection hole is formed at the upper end of the slider, one end of the traction rod is fixed to the connection hole, and the other end forms a connection end, the connection end is used to connect the swivel chair, and the traction rod is used to apply a traction force to the swivel chair along the axis direction of the traction rod.

[0008] As a further improvement of the utility model, the traction rod includes a middle rod and a first connecting rod and a second connecting rod located at both ends of the middle rod. First telescopic cavities and second telescopic cavities are respectively opened at both ends of the middle rod. One end of the first connecting rod is threadedly connected to the first telescopic cavity. One end of the second connecting rod is inserted into the second telescopic cavity and is provided with a spring. Both ends of the spring are respectively connected to the second connecting rod and the second telescopic cavity, and the spring is used to drive the second connecting rod to move towards the middle rod.

[0009] As a further improvement of the present utility model, an installation hole is provided at the end of the second connecting rod, an installation block is rotatably provided in the installation hole, and one end of the spring is connected to the installation block.

[0010] As a further improvement of the present utility model, an installation plate is provided at one end of the first connecting rod / the second connecting rod away from the middle rod, an installation groove is provided on the installation plate, and the installation plate is connected to the swivel chair by bolts.

[0011] As a further improvement of the present utility model, the slider is arc-shaped, two rolling ball groups are symmetrically provided on the upper end face of the slider, both of the two rolling ball groups include at least two rolling ball members arranged along the length direction of the slider, rolling grooves corresponding to the rolling ball members are provided on the inner wall of the sliding groove, and the rolling ball members are used for rolling in the rolling grooves.

[0012] As a further improvement of the present utility model, the rolling ball member is connected to the slider by a spherical pair.

[0013] As a further improvement of the present utility model, a calibration device is further included. Calibration grooves are provided on the receiving surface and are arranged crosswise and perpendicularly. The calibration device includes a bidirectional screw rod and two calibration blocks symmetrically arranged in the calibration grooves. The bidirectional screw rod is respectively connected to the two calibration blocks. The bidirectional screw rod is used to drive the two calibration blocks to approach / separate from each other. The central points of the two calibration blocks are aligned with the axis of the sliding groove.

[0014] As a further improvement of the present utility model, a plurality of positioning holes are provided on the receiving surface, and the positioning holes are connected to the swivel chair by bolts.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The provision of the traction unit can provide continuous and stable traction force for the swivel chair, thereby ensuring the accuracy of test data;

[0017] 2. The provision of the opening can select an appropriate number of traction units according to needs to achieve different simulation environments, thereby improving adaptability, and at the same time facilitating the replacement of the number of traction units;

[0018] 3. The fixed traction rod can ensure the stability of the traction direction during the rotation process to improve the simulation authenticity. Description of the Drawings

[0019] Figure 1 It is the overall installation schematic diagram of the present utility model;

[0020] Figure 2 It is the overall installation sectional schematic diagram of the present utility model;

[0021] Figure 3 It is Figure 2 The partial enlarged view at A;

[0022] Figure 4 For Figure 2 Partial enlarged view at position B;

[0023] Figure 5 Schematic diagram of the slider of the present utility model.

[0024] Reference numerals: 1, base; 2, bearing surface; 3, sliding groove; 4, opening; 5, traction unit; 6, slider; 7, traction rod; 8, connection end; 9, middle rod; 10, first connecting rod; 11, second connecting rod; 12, first telescopic cavity; 13, second telescopic cavity; 14, spring; 15, mounting hole; 16, mounting block; 17, mounting plate; 18, ball member; 19, rolling groove; 20, calibration device; 21, calibration groove; 22, bidirectional screw; 23, calibration block; 24, positioning hole. Detailed implementation manners

[0025] The present utility model will be further described in detail below with reference to the drawings and embodiments. The same components are denoted by the same reference numerals.

[0026] As Figures 1-5 shown, an adjustable base for a swivel chair fatigue performance test includes a base 1, a bearing surface 2 is formed on the base 1, a ring-shaped sliding groove 3 is provided along the axis of the bearing surface 2, and an opening 4 is formed in the sliding groove 3 corresponding to the side surface of the base 1.

[0027] Preferably, it further includes a plurality of traction units 5. Each traction unit 5 includes a slider 6 and a traction rod 7. The slider 6 is located in the sliding groove 3 and is slidably connected to the sliding groove 3. A connection hole is formed at the upper end of the slider 6. One end of the traction rod 7 is fixed to the connection hole, and the other end forms a connection end 8. The connection end 8 is used to connect the swivel chair, and the traction rod 7 is used to apply a traction force along the axis direction of the traction rod 7 to the swivel chair.

[0028] In the existing swivel chair, it generally includes an upper turntable and a lower turntable. The chair part is arranged on the upper turntable, and the lower turntable is used as the base. The upper turntable and the lower turntable rotate relative to each other through a rod. When in use, the swivel chair is placed on the bearing surface 2. Further, an appropriate number of sliders 6 are selected according to the test requirements, and the sliders 6 are placed into the sliding groove 3 along the opening 4, so that the sliders 6 slide in the sliding groove 3. Further, the connection end 8 is fixedly installed with the upper turntable. This fixing method is preferably a bolt or a plug-in connection. Further, one end of the traction rod 7 is fixed to the connection hole, and by adjusting the traction force of the traction rod 7, the situation of a human body on the swivel chair is simulated. Further, the upper turntable is driven to rotate by a rotating component. This part is the prior art and will not be elaborated here. Due to the fixing of the traction rod 7 and the connection hole, during the test process, the traction direction is always perpendicular to the upper turntable direction, so that the simulation is more realistic.

[0029] The traction rod 7 and the connection hole are preferably connected by threads to ensure the connection stability.

[0030] Preferably, the towing bar 7 includes a middle bar 9, a first connecting rod 10 and a second connecting rod 11 located at both ends of the middle bar 9. First telescopic cavities 12 and second telescopic cavities 13 are respectively formed at both ends of the middle bar 9. One end of the first connecting rod 10 is threadedly connected to the first telescopic cavity 12. One end of the second connecting rod 11 is inserted into the second telescopic cavity 13 and is provided with a spring 14. Both ends of the spring 14 are respectively connected to the second connecting rod 11 and the second telescopic cavity 13. The spring 14 is used to drive the second connecting rod 11 to move towards the middle bar.

[0031] During use, both ends of the first connecting rod 10 and the second connecting rod 11 are respectively connected to the upper turntable and the connection holes. Further, by rotating the middle bar 9, the middle bar 9 moves towards the first connecting rod 10, thereby pulling the spring 14, so that the spring 14 is stretched to obtain an elastic force, thereby realizing the towing effect on the upper turntable.

[0032] The setting of the middle bar 9 can ensure the fixation of the first connecting rod 10 and the second connecting rod 11, so as to cooperate with the spring 14 to realize the rapid adjustment of the traction force.

[0033] Optionally, a scale is provided on the outer wall of the second connecting rod 11, and the scale is used to display the traction force of the spring 14 to facilitate the use of the operator.

[0034] Preferably, an installation hole 15 is provided at the end of the second connecting rod 11, and an installation block 16 is rotatably provided in the installation hole 15. One end of the spring 14 is connected to the installation block 16.

[0035] The setting of the installation hole 15 can further increase the length of the second connecting rod 11 in the second telescopic cavity 13, thereby making the connection between the middle bar 9 and the second connecting rod 11 more stable. At the same time, it can also expand the use range of the spring 14 to obtain a greater traction force.

[0036] Preferably, an installation plate 17 is provided at one end of the first connecting rod 10 / second connecting rod 11 away from the middle bar 9. An installation groove is provided on the installation plate 17 and is connected to the swivel chair through bolts.

[0037] Specifically, in this embodiment, the installation plate 17 is provided on the first connecting rod 10. The setting of the installation plate 17 and the installation groove can expand the convenience of connection with the upper turntable to facilitate the connection with the upper turntable.

[0038] Preferably, the slider 6 is arc-shaped. Two ball groups are symmetrically provided on the upper end face of the slider 6. Both ball groups include at least two ball members 18 arranged along the length direction of the slider 6. Corresponding to the ball members 18, rolling grooves 19 are provided on the inner wall of the sliding groove 3, and the ball members 18 are used to roll in the rolling grooves 19.

[0039] The provision of the rolling ball member 18 and the rolling groove 19 can significantly reduce sliding friction and, at the same time, greatly reduce wear to ensure the service life.

[0040] Preferably, the rolling ball member 18 is connected to the slider 6 by a spherical pair.

[0041] The connection mode of the spherical pair can ensure the stability of the position of the rolling ball.

[0042] Preferably, it further includes a calibration device 20. Calibration grooves 21 are provided on the bearing surface 2 and are arranged crosswise and perpendicularly. The calibration device 20 includes a bidirectional screw 22 and two calibration blocks 23 symmetrically arranged in the calibration grooves 21. The bidirectional screw 22 is respectively connected to the two calibration blocks 23. The bidirectional screw 22 is used to drive the two calibration blocks 23 to approach / separate from each other. The central points of the two calibration blocks 23 are aligned with the axis of the sliding groove 3.

[0043] After the swivel chair is placed on the bearing surface 2, the two calibration blocks 23 are driven to move by the bidirectional screw 22, so as to contact the swivel chair. At the same time, the position of the swivel chair is adjusted so that the two calibration blocks 23 can simultaneously contact both sides of the lower turntable to achieve the calibration of the swivel chair. Thus, the axis of the swivel chair is aligned with the axis of the sliding groove 3 through calibration, so as to ensure the stable force of the traction unit 5 during traction, and avoid the defect that the traction unit 5 is unevenly stressed and prone to breakage due to misalignment between the two.

[0044] Preferably, a plurality of positioning holes 24 are provided on the bearing surface 2, and the positioning holes 24 are connected to the swivel chair by bolts.

[0045] The provision of the positioning holes 24 can be applicable to a pre-set swivel chair to complete the fixed positioning of the lower turntable.

[0046] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An adjustable base for fatigue performance test of a swivel chair, characterized in that: It comprises a base (1), a receiving surface (2) is formed on the base (1), an annular slide groove (3) is provided on the receiving surface (2) along the axis, and an opening (4) is formed on the side of the base (1) corresponding to the slide groove (3); A plurality of traction units (5), the traction units (5) comprising a slider (6) and a traction rod (7), the slider (6) being located in a slide groove (3) and slidably connected to the slide groove (3), a connection hole being formed at the upper end of the slider (6), one end of the traction rod (7) being fixed to the connection hole, and the other end forming a connection end (8), the connection end (8) being used for connecting to a swivel chair, and the traction rod (7) being used for applying a traction force to the swivel chair along the axis direction of the traction rod (7).

2. The adjustable base for fatigue performance test of a swivel chair according to claim 1, characterized in that: The traction rod (7) comprises a middle rod (9) and a first connecting rod (10) and a second connecting rod (11) located at two ends of the middle rod (9); a first telescopic cavity (12) and a second telescopic cavity (13) are respectively provided at two ends of the middle rod (9); one end of the first connecting rod (10) is threadedly connected to the first telescopic cavity (12); one end of the second connecting rod (11) is inserted into the second telescopic cavity (13) and is provided with a spring (14); two ends of the spring (14) are respectively connected to the second connecting rod (11) and the second telescopic cavity (13); the spring (14) is used to drive the second connecting rod (11) to move toward the middle rod (9).

3. The adjustable base for fatigue performance test of a swivel chair according to claim 2, characterized in that: The end of the second connecting rod (11) is provided with a mounting hole (15), a mounting block (16) is rotatably arranged in the mounting hole (15), and one end of the spring (14) is connected to the mounting block (16).

4. The adjustable base for fatigue performance test of a swivel chair according to claim 2, characterized in that: A mounting plate (17) is provided at one end of the first connecting rod (10) / the second connecting rod (11) away from the middle rod (9); the mounting plate (17) is provided with a mounting groove and is connected to the swivel chair via bolts.

5. The adjustable base for fatigue performance test of a swivel chair according to claim 1, characterized in that: The slider (6) is arc-shaped, and two rolling ball groups are symmetrically arranged on the upper end surface of the slider (6). The two rolling ball groups each include at least two rolling ball members (18) arranged along the length direction of the slider (6). The inner wall of the slide groove (3) is provided with a rolling groove (19) corresponding to the rolling ball member (18), and the rolling ball member (18) is used to roll in the rolling groove (19).

6. The adjustable base for fatigue performance test of a swivel chair according to claim 5, characterized in that: The rolling ball member (18) is connected to the sliding block (6) in a spherical pair.

7. The adjustable base for fatigue performance test of a swivel chair according to claim 1, characterized in that: The invention also comprises a calibration device (20), wherein the receiving surface (2) is provided with a calibration groove (21) arranged crosswise and vertically, and the calibration device (20) comprises a bidirectional screw (22) and two calibration blocks (23) symmetrically arranged in the calibration groove (21), wherein the bidirectional screw (22) respectively connects the two calibration blocks (23), and the bidirectional screw (22) is used to drive the two calibration blocks (23) to move closer to / away from each other, and the center points of the two calibration blocks (23) are aligned with the axis of the slide groove (3).

8. The adjustable base for fatigue performance test of a swivel chair according to claim 1, characterized in that: The receiving surface (2) is provided with a plurality of positioning holes (24), and the positioning holes (24) are connected to the swivel chair via bolts.

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